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11 results for “jbqueru”
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The first computer to land on my desk was an Amstrad CPC 464 loaner in Jun 1984 (yes, right as it was released).
I'm itching to hack something for the CPC before next summer to commemorate my 40 years of coding.
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Little Mylo asked to be rescued by us, 10 days ago. She's not afraid of anyone. And she's now sleeping softly on top of a couch.
As I was writing that, she came to sleep against me, on top of my arms, purring loudly.
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Little Mylo asked to be rescued by us, 10 days ago. She's not afraid of anyone. And she's now sleeping softly on top of a couch.
As I was writing that, she came to sleep against me, on top of my arms, purring loudly.
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Of all the CRTC registers I could get wrong, I had to mess up the screen's start address. Guess what? It didn't display what I expected!
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Setting up a custom CRTC resolution, for fun and for profit (and for horizontal overscan, going for 384 * 168).
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I think I understand the purpose of the Z80's EX (SP), HL instruction. Or at least one of the ways it can be useful.
Here's what I'm guessing: to jump to a variable address, the Z80 has JP (HL). That's great, but it clobbers HL.
Now, remember, JP (HL) is really LD PC, HL. Another way to write to PC is to POP PC, which is actually RET. We just need to PUSH the destination to the stack. But, if we do that, we can't POP the registers that we saved any more.
#Z80 #Assembly #RetroComputing
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